No, both need to stay in to, as you have aptly pointed out, keep Romney from gaining the nomination and the needed number of delegates.
Romney must not win, he will be a disaster in the general election against Obama.
We are now forced to induce a Brokered Convention, which also makes the party as a whole, look like a joke.....
Santorum is NOT an option. And Newt also knows this, because he has seen Santorum in action. When the smartest candidate we have had, in our lifetime, refuses to team up with an alternate like Santorum, then something is not right and this party had better grow a brain real quick.
Newt Gingrich, knows RINOs inside and out. And this is exactly how he sees Santorum. Believe it.